Kapteyn may refer to:
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Jacobus Kapteyn
Jacobus Cornelius Kapteyn (19 January 1851 – 18 June 1922) was a Dutch astronomy, astronomer. He carried out extensive studies of the Milky Way. He found that the apparent movement of stars was not randomly distributed but had two preferentia ...
- Astronomer
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Parallactic instrument of Kapteyn
The parallactic instrument of Kapteyn is a measuring instrument created by the Dutch astronomer Jacobus Kapteyn around 1886. Using this instrument, Kapteyn analyzed over 1,700 photographic plate, glass plate photos of stars seen from the southern ...
- the instrument used by Kapteyn to analyze photographic plates
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Jacobus Kapteyn Telescope
The Jacobus Kapteyn Telescope or JKT is a 1-metre optical telescope named for the Dutch astronomer Jacobus Kapteyn (1851–1922) of the Isaac Newton Group of Telescopes at the Roque de los Muchachos Observatory on La Palma in the Canary Islands, S ...
- telescope named after Jacobus Kapteyn
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Kapteyn's Star
Kapteyn's Star is a class M1 red subdwarf about 12.83 light-years from Earth in the southern constellation Pictor; it is the closest halo star to the Solar System. With an apparent magnitude of nearly 9, it is visible through binocul ...
- star named after Jacobus Kapteyn
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Kapteyn (crater)
Kapteyn is a lunar impact crater that is near the eastern limb of the Moon, to the west of the crater La Pérouse. West of Kapteyn is the slightly smaller Barkla, and farther to the west-northwest is the prominent Langrenus. Von Behring is t ...
- Lunar crater named after Jacobus Kapteyn
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Kapteyn Astronomical Institute The Kapteyn Astronomical Institute is the department of astronomy of the University of Groningen in the Netherlands.
The institute is named after its founder, Jacobus Cornelius Kapteyn, who lived from 1851 to 1922. Jacobus Kapteyn was appointed pr ...
- Dutch Astronomical Institute named after Jacobus Kapteyn
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Paul Joan George Kapteyn - Dutch Judge
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